The most common and most likely answer to this crossword clue is the 9 letter word BASTINADO
B
A
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T
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A
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O
More clues leading to the result BASTINADO
- Brass work at sustaining tuning note following endless bass beat
- A bandit so bad gets a form of torture
- Thrashing is not a bad form of punishment
- Abstain when whipped and party gives punishment
- It’s bad on a bust and torture on the soles of the feet
- A pain that doesn’t end in wicked old form of torture
- Fortress partially in trouble; gets a beating
- Bully Sinbad to a beating
- Breaking a bond and drinking wine — it’s torture
- Endless culinary action with fuss — it's torture
Buddy explains!

The straight part
We know that "torture" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case torture = bastinado.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does BASTINADO mean?
BASTINADO noun- A blow with a stick or cudgel.
- Beating the bare soles of the feet with a stick: a form of corporal punishment used primarily within prisons in various countries. The receiving person is required to be barefoot.
- To punish a person by beating the bare soles of the feet, using a stick or truncheon.